Flashcards
Lecture 9- Chemical Bonding III (Dative)
Cards in this deck (21)
- 1What is a dative bond?Sharing of two electrons when both electrons are provided by one of the linked atoms?
- 2What is the atoms that supplies the pair of electrons called?Donor
- 3What is the atom that doesn't donate any electrons called?Acceptor
- 4Can you distinguish a co-ordinate bond from a normal covalent bond?NO
- 5Where are co-ordinate bonds usually found?Transition metal complex ions, the ammonium ion, the hydroxonium ion, carbon monoxide and nitric acid
- 6What are the requirements for a dative bond?The atom acting as the donor must have a lone pair of electrons. The acceptor should have a vacant orbital to accept the electron pair.
- 7What is an ammonium ion?NH4+
- 8Do co-ordinate compounds have higher or lower boiling points than purely covalent compounds?HIGHER (lower than ionic)
- 9Are co-ordinate compounds soluble?Soluble in non-polar solvents but less soluble in non-polar solvents (can react with water)
- 10Can co-ordinate compounds conduct electricity?NO
- 11What biological molecules depend on co-ordinate bonding?Haemoglobin, Myoglobin, Vitamin B12, Chlorophyll
- 12How do some drugs depend on of co-ordinate bonding?Some act as donors in dative covalent bonds and some act as acceptors for biological donors
- 13—Shape:Linear
Bond Angle: 180 - 14—Shape: trigonal planar
Bond angle: 120
- 15—Shape: tetrahedral
Bond angle: 109.5
- 16—Shape: trigonal bipyramidal
Bond angles: 90, 120
- 17—Shape: octahedral
Bond angle:90
- 18If a molecule has lone pairs present what can happen to the shape of the molecule?The molecules shape becomes distorted due to repulsion between lone pairs and other pairs of electrons
- 19—Shape: pyramidal
Bond angle: 109.5-2.5=107
- 20—Shape: bent planar
Bond angle: 109.5-4=104.5
- 21—Shape: square planar
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- Chemistry (Lecture 9- Chemical Bonding III (Dative)) Flashcards on Lecture 9- Chemical Bonding III (Dative), created by emma_moran on 02/01/2014.
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